Am I on my period?? I have bleeding but no cramps.

So I am usually all about being on time with my period. I was due to start it yesterday, and I did start to have some spotting and brownish discharge. It wasn't enough for me to need a tampon really, but I put one in anyway. When I removed it, it wasn't very saturated but there was some bright red blood on it. Today it's the same kind of thing. I have red blood, but not much and a little bit of the brown discharge... but NO cramps. Usually I cramp like crazy on the second day and am pretty heavy.

I could just be being paranoid, but me and my boyfriend had sex on the 20th and the condom broke. I went and got Plan B as soon as I had the chance which was about 48 hours after that. You can take it up to 72 hours after. I do NOT have any symptoms of pregnancy, no fatigue, dizziness, nausia, swollen breasts... nothing.

Also, I am finishing up school and finals are this week. So I'm stressing. I HAVE missed periods before due to stress. Also, I'm stressed about my Birthday and turning 25. :( Please let me know what you think. If you think I should take a pregnancy test I will do so... I took a pregnancy test last week because I was feeling paranoid too. It's just weird that I do have a fair amount of red blood and brown discharge, but NO cramps!

I also took Plan B when the condom broke when me and my boyfriend were having sex. but i took it 4 days before my period was due just in case. I started off spotting brown and pink discharge but then it turned into a darker brown and red like you have described. I read that plan b can cause you to have a lighter period. I also have had barely any cramps and I am used to a full heavy period. This has lasted 5 days for me and I don't know if for sure if it's my period for the month or not. It was also weird because I had breast tenderness for about a week before my period was due and when the spotting came on the day of my period it went away! but i think i am also going to take a pregnancy test this week just in case..